\begin{figure}[htb]
	\centering
	
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	\end{pdfpic} 
	\caption[Example of Progressive Mesh Sequence]{Example of PM sequence. Dashed edges are selected sequentially and collapse writ $ecol$ operation. And reversely, for each $M^i$, a $vsplit_i$ operation can be applied and reconstruct a new mesh $M^{i+1}$ with more details.}
	\label{fig:PmExample}

\end{figure}